I'm a bit late in taking note of this – ArtRage 4 released back in February. Look, ArtRage is the best value you are going for a painting program you are going to get on Windows or Mac (it runs on both). I've been recommending it for years, and ArtRage 4,0 still my top pick.

From a feature perspective there are a couple of nice improvements since ArtRage 3.5.5 but nothing major. Having said that let's look more closely.

The Application icon has received a minor tweak. The screenshot below is from the Windows 8 Start Screen with ArtRage Studio Pro 3.5.5 on the left and ArtRage 4 on the right. Apparently they've dropped the “Studio Pro” from the name.

Overall Application: ArtRage Studio Pro 3.5.5

Overall Application: ArtRage 4

The overall interface hasn't changed. You may notice though that some icons look a bit different.